F25J 3/0469
And an intermediate re-boiler/condenser
Official title: {and an intermediate re-boiler/condenser (F25J3/04696 takes precedence)}
F25J3/0469 (And an intermediate re-boiler/condenser) appears on 18 US grants and 1 published applications in this corpus.
Search patents in F25J- Granted patents
- 18
- Published applications
- 1
- Assignees
- 5
- Inventors
- 18
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for separating air by cryogenic distillation26 May 2026US 12,638,239 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation13 Apr 1999US 5,893,276 AThe BOC Group, Inc.
- Air separation in a double rectification column30 Mar 1999US 5,887,447 AThe BOC Group, Inc.
- Air seperation22 Sep 1998US 5,809,802 AThe BOC Group, Inc.
- Argon separation method and apparatus therefor28 Jul 1998US 5,784,899 ANippon Sanso Corporation
Most cited
By later US patents
- Enhanced recovery of argon from cryogenic air separation cycles31US 5,114,449 AAir Products and Chemicals, Inc. · 1992
- Increased argon recovery from air distillation29US 4,670,031 A1987
- Air distillation improvements for high purity oxygen21US 4,737,177 A1988
- Rectifier liquid generated intermediate reflux for subambient cascades18US 4,854,954 A1989
- Optimized intermediate height reflux for multipressure air distillation16US 4,817,394 A1989